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Age of first use: (Arseneault et al, 2002) N=472 (12 – 23 jr)  Cann use before 14th  Cann use after 14th CAPE Community Assessment of Psychic Experiences CAPE Community Assessment of Psychic Experiences The CAPE-42 is based on the PDI-21 and PDI-40 developed by Emmanuelle Peters et al (2001)PDI-21PDI-40 (van Os, Verdoux, Hanssen) Positive dimension psychosis